CN105889460A - Powder metal hub and treatment - Google Patents

Powder metal hub and treatment Download PDF

Info

Publication number
CN105889460A
CN105889460A CN201610208050.8A CN201610208050A CN105889460A CN 105889460 A CN105889460 A CN 105889460A CN 201610208050 A CN201610208050 A CN 201610208050A CN 105889460 A CN105889460 A CN 105889460A
Authority
CN
China
Prior art keywords
gear
gear hub
hub
powder metal
metal materials
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610208050.8A
Other languages
Chinese (zh)
Other versions
CN105889460B (en
Inventor
A·G·图尔克
J·E·贝耶莱因
N·A·冯马特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexteer Beijing Technology Co Ltd
Original Assignee
Nexteer Beijing Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexteer Beijing Technology Co Ltd filed Critical Nexteer Beijing Technology Co Ltd
Publication of CN105889460A publication Critical patent/CN105889460A/en
Application granted granted Critical
Publication of CN105889460B publication Critical patent/CN105889460B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F3/26—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • B29C65/46—Joining a heated non plastics element to a plastics element heated by induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/026—Chemical pre-treatments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0344—Annealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D15/00—Producing gear wheels or similar articles with grooves or projections, e.g. control knobs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/041—Coatings or solid lubricants, e.g. antiseize layers or pastes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7316—Surface properties
    • B29C66/73161—Roughness or rugosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
    • B29L2015/006—Pinions, sprocket-wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F16H2055/065—Moulded gears, e.g. inserts therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Gears, Cams (AREA)
  • Power Steering Mechanism (AREA)

Abstract

A method of making a worm gear is provided. The method comprises forming a gear hub from a powdered metal material. Thereafter an outer surface of the gear hub is sealed.

Description

Powdered-metal hub and process
Technical field
The subject innovation relates to a kind of scroll gear hub (worm gear hub), and more specifically, Relate to the scroll gear hub assembly being suitable in electric power steering unit and system using.
Background technology
In electric power steering (EPS) unit, electrical motor driven worm shaft (worm shaft) And scroll gear, provide assist torque with the rotation to steering spindle.Which reduce and make Vehicular turn Required power.At present, the scroll gear used in such systems has used single solid steel disk system Become.Annular knurl processed on periphery by the most each disk.Then disk is the pedestal of scroll gear assembly Or hub.
Knurled surface is carried out sandblasting (bead blast) to prepare for solution of silane process, this silicon Alkane solution processes and prepares metal for combination.The plastic hoop made by rotation casting method is placed On metal.After plastics are pressed, heat scroll gear assembly, to cause plastic molting In the knurled surface of wheel hub and be incorporated into steel.This followed by the annealing cycle so that plastics should Power eliminates.Hub assembly is forced on axle, and tooth is by hobbing (or cutting) to plastic hoop, with complete Become gear assembly.As used in electric power steering application or other application, annular knurl is to moulding Assist torque is passed through scroll gear component passes to steering spindle from worm shaft by the combination of material.Manufacture The method of one gear hub assembly can find in U.S. Patent number No.6,638,390.
Processing gear hub needs volume to form knurled surface (utilizing this knurled surface to combine plastics) Outer technique and process.
Accordingly, it is desired to provide one can be transmitted torque between worm shaft and steering spindle and not have The scroll gear hub of prior art shortcoming and scroll gear hub assembly.
Summary of the invention
An example embodiment according to the present invention, it is provided that a kind of side manufacturing scroll gear Method.The method includes being formed gear hub by powder metal materials.Seal the appearance of gear hub afterwards Face.
In yet another exemplary embodiment of the present invention, a kind of gear hub is additionally provided.It include by The gear hub main body that powder metal materials is formed.Gear hub main body has Packed outer surface.
In the another exemplary embodiment of the present invention, it is provided that a kind of electric boosting steering system. This electric boosting steering system includes steering spindle, this steering spindle be connected at one end deflecting roller and It is connected to steering by rack and pinion mechanism in opposite end.Provide steering assistance unit, its Including electro-motor, this electro-motor is operated by controller and drives worm screw.Scroll gear is placed in Between worm screw and steering spindle, worm screw has worm tooth and this worm tooth is assemblied in steering spindle.Snail Shape gear also includes the dish formed by powder metal materials.This dish has Packed outer surface.Carry Polymer ring for a part for covering dish.This ring has the gear on the outer edge surface of ring Tooth, engages for worm tooth.
When combining accompanying drawing and understanding, easily from the present invention described in detail below understand this Bright features above and advantage and other feature and advantage.
Accompanying drawing explanation
Other purposes, feature, advantage and details be only used as example occur in embodiment following in detail Thin describe, this detailed description referring to the drawings, in the accompanying drawings:
Fig. 1 is the schematic diagram of the power steering system according to the present invention；
Fig. 2 is the flow chart illustrating the method forming and processing powder metal gear hub；
Fig. 3 A is the front view of the gear hub according to the present invention；
Fig. 3 B is the isometric view of the gear hub according to the present invention；
Fig. 4 A is the micrograph on the surface processed of gear hub；
Fig. 4 B is another micrograph on the surface processed of gear hub；
Fig. 5 is the diagram illustrating another aspect of the present invention；
Fig. 6 is the diagram of finished product scroll gear according to an aspect of the present invention；And
Fig. 7 is front view, is partly illustrated in cross-section another aspect of the present invention.
Detailed description of the invention
With reference now to accompanying drawing, wherein the present invention will be at reference specific embodiment not to limiting In the case of describe, and according to the example embodiment of the present invention, Fig. 1 shows for motor-driven Electric power steering (EPS) system 10 of vehicle.EPS 10 includes that rack and pinion type turns To mechanism 12, this rack and pinion type steering mechanism 12 includes being positioned at below gear housing 14 Tooth bar (not shown) and little gear (not shown).Deflecting roller 16 is connected to steering spindle 18.? When deflecting roller 16 is rotated, (it is connected to lower steering spindle 20 and universal joint to upper steering spindle 18 22) rotation pinion.The tooth bar in rotary moving of little gear, tooth bar moves tie-rod 24 and (only illustrates one Individual), tie-rod 24 moves again steering connections 26 (only illustrating), and steering connections 26 rotates wheel 28 (only illustrating one).
EPS assist torque is provided by steering assistance unit 30, and steering assistance unit 30 wraps Include controller 32 and electro-motor 34.Controller 32 is passed through supply connection by vehicle power supply 36 38 carry out energy supply.Controller 32 receives the signal of instruction car speed by holding wire 40.Turn to Pinion gear angle is measured by position sensor 42, and is sent to controller 32 by circuit 44. When deflecting roller 16 is rotated, torque sensor 43 senses and is applied to turn to by vehicle operators The torque of wheel 16.Torque sensor 43 can include that torsion bar (not shown) and resistance pass Sensor (not shown), resistance sensor passes through line relatively with the twist angle on torsion bar Road 46 exports variable resistor signal to controller 32.
In response to the input on circuit 40,44 and 46, controller 32 passes through circuit 48 to electricity Dynamic motor 34 sends command signal.Motor 34 further through worm screw 50 and scroll gear 52 to turning Assist torque is supplied, in order to steering 10 is provided and turns to torque to assist to system 10, should Torque auxiliary is turned to supplement the steering force applied by vehicle operators.
In the exemplary embodiments, gear hub is used for forming scroll gear 52.In the exemplary embodiments, Gear hub is formed by powdered-metal.Fig. 2 shows flow chart, and this flowchart illustration is by powder gold Belong to the manufacture of the gear hub formed.In step 202., pressed powder metal is to form gear hub. Powdered-metal can be any applicable powdered-metal.In the exemplary embodiments, powdered-metal mould Tool is used for forming gear hub, the gear hub illustrated the most in figures 3 a and 3b.
Fig. 3 A and 3B shows gear hub 110.In the exemplary embodiments, gear hub 110 wraps Include the diameter limited by multiple teeth 112.In the exemplary embodiments, tooth 112 be with helical angle from The helical tooth 112 that central axis " X " extends radially out.In certain embodiments, spiral shell Rotation tooth 112 configures with the approximate angle of 19 degree relative to " X " axis.
Gear hub 110 also includes inner circumferential edge 114.The main part 115 of hub 110 is in periphery Extend between edge 111 and inner circumferential edge 114.The contrary inner face 132 of gear hub 110 With contrary outside 133 in main part 115 the most asymmetrical.In some embodiment In, hole 116 is formed through face 132,133.Advantageously, quality can be saved in hole 116, Simultaneously facilitate the assembling of EPS unit, all EPS unit as shown in figs. 1 and 7.
Advantageously, the geometry of gear hub 110, the most multiple helical tooths 112, it is allowed to hold Change places and remove formed gear hub 110 from powder metal die, consequently facilitating the operation simplified. It addition, the geometry of gear hub 110 and helical tooth 112 allows relatively large surface area, With the excellent axially and radially fixing of the polymer ring being formed on, thus promote high-quality In conjunction with.In certain embodiments, helical tooth 112 is undercut, during shaping with further promotion The flowing of plastics.
Referring back to Fig. 2, in step 204, sinterable suppressed powdered-metal, with shape Become gear hub, such as gear hub 110.Due to material and formation process, at sintering After, powdered-metal can be porous.Strong in order to promote between metal-toothed wheel hub and polymer ring In conjunction with, adhesion promoter, such as solution of silane can be applied.But, the hole of powder metal component Gap rate can damage the adhesion between powder metal gear hub and polymer ring, and solution of silane Application.Therefore, the surface of gear hub can be processed, to promote that adhering to and improve solution of silane processes Effect, as described in step 206a and 206b.
In example embodiment, as shown in step 206a, the outer surface of gear hub may utilize steam Process.In the exemplary embodiments, utilize steam process gear hub outer surface to form oxidation, Carry out sealing surfaces and reduce surface porosity factor.In certain embodiments, gear hub is exposed to scope From 925 degrees Fahrenheits to the steam of 1000 degrees Fahrenheits about 1 hour.After this steam processes, Form black oxide from the teeth outwards, so that surface porosity factor minimizes.Advantageously, steaming Vapour also forms surface roughness during processing, thus is easy to application and the rush of solution of silane further Enter the adhesion with polymer ring.The relative surface roughness of the powder metal gear hub that steam processes It is shown in Fig. 4 A and 4B.
In other embodiments, as shown in step 206b, seal or otherwise with tree Fat processes the aperture of outer surface.Resin can be impregnated in the outer surface of powder metal gear hub, So that the application of solution of silane.
In certain embodiments, as shown in step 208, solution of silane is applied to gear hub Outer surface.Solution of silane can include polymer chain, and polymer chain is easy to powder metal gear Adhesion between hub and polymer (such as forming the polymer ring of scroll gear).In demonstration In embodiment, applying of solution of silane forms monoatomic layer in the surface of gear hub, wherein, Side is incorporated into inorganic compound, such as powder metal surface, and opposite side is incorporated into and organises Compound, such as polymer ring.In the exemplary embodiments, the table before powder metal gear hub Face processes and allows solution of silane to process the surface being maintained at gear hub, and not by voluminous powder gold Belong to structure to absorb.
In the exemplary embodiments, as illustrated in step 210, a part for gear hub is formed Polymer ring.With reference now to Fig. 5, polymer ring 160 is placed on gear hub 110, with shape Become gear blank 170.Surface processes and solution of silane can improve polymer ring 160 and gear hub Adhesiveness between 110.Polymer ring 160 includes inner ring surface 161, outer ring surface 162 and outer Edge surface 163.Outer edge surface 163 has the external diameter bigger than the diameter of gear hub 110. The helical tooth 112 of gear hub 110 is covered by polymer ring 160, and is enclosed in wherein.Showing In model embodiment, polymer ring 160 is injection molded on gear hub 110, by helical tooth 112 Promote.In other embodiments, polymer ring 160 is formed by cutting looped rotation cast tube, wherein, The polymer ring 160 of gained is pressed onto on gear hub 110.In certain embodiments, inductively Heat gear hub 110 and polymer ring 160, with the inner surface of melt polymer ring 160, with Flow into and adhere to helical tooth 112 after cooling.Advantageously, helical tooth 112 can undercut, To allow the polymer of injection molding to flow wherein.Additionally, by being placed on following spiral Polymer ring is formed on tooth 112, scroll gear 52 can have the intensity of increase, load is transmitted, The axial holding of polymer ring 160 and the radial direction fixing of polymer ring 160.It addition, reduce Axial dipole field and increase torque transmission.Cross section injection molded polymer ring with general rectangular 160, thus form generally round shape, thus complete gear blank as seen in Figure 5 170。
Afterwards, gear blank 170 is forced on axle, and in the example shown, overwhelms down In steering spindle 20.Press step followed by generation process, as in the step 212 of Fig. 2 Illustrating, multiple single gear teeth 180 are cut to the polymer ring of gear blank 170 by it In the outer edge surface 163 of 160.In certain embodiments, the angle of gear teeth 180 with The angle automatching of the helical tooth 112 formed in gear hub.Advantageously, had by formation and put At the gear teeth 180 of the identical angle of following helical tooth, scroll gear 52 can have raising Intensity, load transmission and the axial holding of polymer ring 160.Reduce additionally, axial dipole field And increase torque transmission.In result is the steering mechanism 12 being placed in Fig. 7 shown in Fig. 6 Scroll gear 52.As illustrated, Fig. 7 shows lower steering spindle 20 and is connected to torsion bar The torque sensor 43 of 45.The scroll gear 52 illustrated in cross section is crushed on lower steering spindle 20 Above and being driven by worm screw 50, worm screw 50 is driven by electro-motor 34 (shown in Fig. 1) again.
Use powdered-metal structure to allow to save weight and cost, realize such as helical tooth simultaneously The feature of 112 and without second process, such as process.In the non-limiting illustrated embodiment, The lower torsional rigidity between axle 20 and worm screw 50 of helical tooth 112 carrying of scroll gear 52, Thus allow EPS 10 reliably to run under significant cost reduces.
Although describing the present invention with reference to example embodiment, but it will be appreciated by those skilled in the art that , can be variously modified and can equivalent its key element alternative without departing from the model of the present invention Enclose.Additionally, can many modifications may be made, so that specific situation or material adapt to the religion of the present invention Lead without departing from its essential scope.Therefore, it is intended that the invention is not restricted to as realizing this Bright and the specific embodiment disclosed in preferred forms conceived, but the present invention will include falling Enter all embodiments in scope of the present application.

Claims (14)

1. the method manufacturing scroll gear, comprising:
Gear hub is formed by powder metal materials；And
Seal the outer surface of described gear hub.
Method the most according to claim 1, also includes the appearance aoxidizing described gear hub Face.
Method the most according to claim 1, also includes that steam processes outside described gear hub Surface.
Method the most according to claim 1, also includes impregnating described gear hub with resin Outer surface.
Method the most according to claim 1, also includes making described outer surface be exposed to silane Solution.
Method the most according to claim 1, also include suppressing described powder metal materials with Form described gear hub.
Method the most according to claim 1, also include sintering described powder metal materials with Form described gear hub.
Method the most according to claim 1, also includes the outer peripheral edge along described gear hub Edge forms multiple tooth.
Method the most according to claim 1, also includes being formed or placing covering described gear The polymer ring of a part for hub.
10. a gear hub, comprising:
The gear hub main body formed by powder metal materials, wherein, described gear hub main body has The outer surface sealed.
11. gear hubs according to claim 10, wherein, the outer surface quilt of described sealing Oxidation.
12. gear hubs according to claim 10, wherein, the outer surface quilt of described sealing Steam processes.
13. gear hubs according to claim 10, wherein, the outer surface quilt of described sealing Resin impregnates.
14. gear hubs according to claim 10, wherein, the outer surface quilt of described sealing Solution of silane is utilized to process.
CN201610208050.8A 2015-01-28 2016-01-28 Powdered-metal hub and processing Expired - Fee Related CN105889460B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/607,304 US9759304B2 (en) 2015-01-28 2015-01-28 Powder metal hub and treatment
US14/607304 2015-01-28

Publications (2)

Publication Number Publication Date
CN105889460A true CN105889460A (en) 2016-08-24
CN105889460B CN105889460B (en) 2018-12-25

Family

ID=55527706

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610208050.8A Expired - Fee Related CN105889460B (en) 2015-01-28 2016-01-28 Powdered-metal hub and processing

Country Status (3)

Country Link
US (1) US9759304B2 (en)
EP (1) EP3050692B1 (en)
CN (1) CN105889460B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112792336A (en) * 2020-12-29 2021-05-14 广东东睦新材料有限公司 Valve plate machining process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11267061B2 (en) * 2019-04-16 2022-03-08 GM Global Technology Operations LLC Method of manufacturing components made of dissimilar metals
US11333234B2 (en) * 2019-12-10 2022-05-17 Steering Solutions Ip Holding Corporation System, method and apparatus for metallic gear hub with metallic teeth having outer polymer layer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232727A1 (en) * 1972-07-04 1974-01-24 Continental Gummi Werke Ag Variable diameter mould - esp for coating roller cores with a plastic outer case
WO2002002296A1 (en) * 2000-07-06 2002-01-10 Dsm N.V. Method for the production of a resin molded article having a metallic boss
US6638390B1 (en) * 1999-12-03 2003-10-28 Delphi Technologies, Inc. Gear production process
WO2013127905A1 (en) * 2012-02-29 2013-09-06 Höganäs Ab (Publ) Pm automotive component and its manufacture
CN203362875U (en) * 2013-07-08 2013-12-25 常州欧凯电器有限公司 Powder metallurgy high-torque slipping type gear
US20140339011A1 (en) * 2009-06-19 2014-11-20 Steering Solutions Ip Holding Corporation Worm gear hub

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180171A (en) * 1962-03-06 1965-04-27 American Plastics Corp Thermoplastic resin covered gear and method of making same
US4708912A (en) * 1984-07-18 1987-11-24 Sintermetallwerk Krebsoege Gmgh Sintered metal body with at least one toothing
JP3371482B2 (en) 1992-09-30 2003-01-27 住友電気工業株式会社 Wheel speed detecting gear and manufacturing method thereof
US5897826A (en) * 1996-06-14 1999-04-27 Materials Innovation, Inc. Pulsed pressurized powder feed system and method for uniform particulate material delivery
US5786098A (en) 1996-10-07 1998-07-28 Caterpillar Inc. Iron oxide coated low alloy steel substrate for improved boundary lubrication
US6134786A (en) * 1999-01-29 2000-10-24 Amsted Industries Incorporated Method for improvement of involute and lead error in powder metal gears
KR20040025835A (en) * 2002-09-20 2004-03-26 미쓰비시 마테리알 가부시키가이샤 Sprocket integrated type housing and method for manufacturing the same
US7520940B2 (en) * 2004-07-29 2009-04-21 Caterpillar Inc. Steam oxidation of powder metal parts
AT506908B1 (en) * 2007-12-14 2010-02-15 High Tech Coatings Gmbh METHOD FOR PRODUCING A POLYMER COATING
US8870997B2 (en) * 2008-06-06 2014-10-28 Hoganas Ab (Publ) Iron-based pre-alloyed powder
US8328464B2 (en) * 2011-02-04 2012-12-11 Wacker Neuson Production Americas Llc Vibratory roller with composite exciter drive gear
TWI523649B (en) 2012-06-28 2016-03-01 萊鎂醫療器材股份有限公司 Adhesive strip with non-adhesive band

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232727A1 (en) * 1972-07-04 1974-01-24 Continental Gummi Werke Ag Variable diameter mould - esp for coating roller cores with a plastic outer case
US6638390B1 (en) * 1999-12-03 2003-10-28 Delphi Technologies, Inc. Gear production process
WO2002002296A1 (en) * 2000-07-06 2002-01-10 Dsm N.V. Method for the production of a resin molded article having a metallic boss
US20140339011A1 (en) * 2009-06-19 2014-11-20 Steering Solutions Ip Holding Corporation Worm gear hub
WO2013127905A1 (en) * 2012-02-29 2013-09-06 Höganäs Ab (Publ) Pm automotive component and its manufacture
CN203362875U (en) * 2013-07-08 2013-12-25 常州欧凯电器有限公司 Powder metallurgy high-torque slipping type gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112792336A (en) * 2020-12-29 2021-05-14 广东东睦新材料有限公司 Valve plate machining process

Also Published As

Publication number Publication date
EP3050692A1 (en) 2016-08-03
EP3050692B1 (en) 2019-05-01
US9759304B2 (en) 2017-09-12
CN105889460B (en) 2018-12-25
US20160215865A1 (en) 2016-07-28

Similar Documents

Publication Publication Date Title
US20220227411A1 (en) Worm gear hub
US6497041B2 (en) Method of producing resin gear
CN103261749B (en) Worm gear and electric type power steering device
CN105889460A (en) Powder metal hub and treatment
CN104246303B (en) Worm gear, electric power-assisted steering apparatus
CN106573291B (en) Rack and method for manufacturing rack
CN106536326A (en) Steering shaft for a motor vehicle steering system
CN103736825A (en) Punching and swing grinding die of half axle with flange disc
US20190176418A1 (en) Method for producing a ring gear for a planetary gear train, and a modular system having such a ring gear
KR101906716B1 (en) Wormwheel for electronic steering
JP6286754B2 (en) Manufacturing method of core metal for resin gear and composite member for resin gear
US20100320025A1 (en) Worm gear hub
CN105782401A (en) Worm Wheel Of Reduction Gear For Use In Electric Power Steering
WO2017135135A1 (en) Worm wheel, worm decelerator, and method for producing worm wheel
KR102324643B1 (en) Reducer of Power Steering Apparatus for Vehicle and Manufacturing Method of The Same
CN101521412B (en) Rotor and manufacturing method for resin magnet
JP4164173B2 (en) Manufacturing method of resin gear
JP2006336814A (en) Worm wheel structure and power steering device using worm wheel
KR20160037924A (en) Rotor for an electric motor and method for producing the rotor
JP2018090081A (en) Manufacturing method for steering device and steering device
CN220416153U (en) Worm wheel
JP2016068652A (en) Worm wheel for electric power steering device and manufacturing method of the same
JP2021042839A (en) Worm wheel unit, its manufacturing method and worm reduction gear
JP6543949B2 (en) Manufacturing method of resin gear housing
JP5958145B2 (en) Electric power steering apparatus and manufacturing method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181225

Termination date: 20220128